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Repair & Maintenance Having problems? Doing a rebuild? All Repair/Maintenance Discussions here.

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post #1 of 84 (permalink) Old 01-06-2018, 11:11 PM Thread Starter
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Swamped Fourtrax 300

Hi everyone!

I recently inherited a 1998 Fourtrax 300 4WD. I was quite exited to get it fixed up and going. You can see pics in my introduction post. I hoped to just have to do some minor repairs, clean the carb, and replace all the fluids. This is all I know how to do anyway.

Unfortunately, it appears that the last time the bike was used (a few years ago) it had been swamped. I'm not sure what to do next. Some pictures below. Any suggestions?

Airbox:
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Tube leading into airbox:
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Carb:
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Oil filter:
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Water in oil:
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post #2 of 84 (permalink) Old 01-07-2018, 05:06 AM
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Judging from looking at the pics of the oil filter, the water in the oil, the sand in the air inlet and the two years of time ( I believe you said 2 years ) that went by since this all happened, I think you only have one option, to split the case and inspect and then make a determination if is is feasible to rebuild the engine or look for another one, any thing is rebuildable with enough money, but it comes to a point of whether or not it is worth it

you could flush it with diesel several times, fill it up with fresh oil, test the compression, and see if you can get it to start, but if there is sludge in the case, it is not going to last long

you may want to keep this one as a part bike and find another same gen 300 to build
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post #3 of 84 (permalink) Old 01-07-2018, 07:40 AM
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Id be splitting the cases on this one.


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post #4 of 84 (permalink) Old 01-07-2018, 09:25 AM
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Quote:
Originally Posted by mac102004 View Post
I’d be splitting the cases on this one.


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what a quick flush won't get her back up and running in NO time here?? LOL
come on some of the new HIGH TEC oils we have today should be fine here, I see many say they have added cleaning agents in them? HAHA!

NO I agree with Fish here, open this thing up and see, Many things might be rusted to all heck and be worthless to re use and rebuild
I'd also be looking at axles too, as odds are they will have issue's too, if diffs have as much water in them as motor had!
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post #5 of 84 (permalink) Old 01-07-2018, 10:00 AM
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You have a lot of options and it looks like you still have enthusiasm to work on it. There are two paths for you:

Short cycle time you can sell or part it out to someone who has the ability to bring it back. Down side is you will always want to have gotten your hands dirty. Up side you learn enough about these machines to buy one that runs for $2500 and work on that oneuse yours as a Parts machine.

Long term you could rebuild and restore it. This might take you at least a year and maybe three. Find another with a bent frame. Send the engine off to a rebuilder or buy an engine off a parts machine. Rebuild the carb, axles, side gear, swing arms, everything with grit/dirt in it. Hunt Parts houses, fleabay and kreigzleist and be at least $3000 invested.

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post #6 of 84 (permalink) Old 01-07-2018, 10:40 AM Thread Starter
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This all makes me sad. Im happy to get my hands dirty and learn, but spending a year rebuilding it...

How much work is splitting the case? If I did that and posted some pics would you folks be able to help me determine if it needs rebuilding? I guess I am holding on to some hope I can get this guy living again without an engine rebuild.

Thanks so much for all of your great insight so far!

Swamped, stock 1998 TRX300FW
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post #7 of 84 (permalink) Old 01-07-2018, 11:53 AM
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You could probably find another complete engine for under $500, so there is that option if you feel like splitting this one is maybe too much work or beyond your capabilities.


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2015 Honda Rubicant FM7
- 27" Bighorn 2.0's
- Powermadd Handguards
- ODI Grips

2016 Can-am Renegade 1000R XMR
- 31x11" Outlaws
- NPP Dual Dominators
- Monster Power Tuner + Autotune
- ECM Reflash
- TheBOM Mag+ Cams
- TwinAir Air filter
- Delrin Motor Mounts
- Aluminum Valve Covers
- Gorilla Through Shaft
- TigerTail
- Amsteel Synthetic Winch rope
- Cecco Racing Steering Stem Brace
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post #8 of 84 (permalink) Old 01-07-2018, 12:51 PM
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It sounds to me like you might be a lot more capable than many other rookies... :-) You got the bike free and are itchin' to get dirty, so why not tear it down and find out whatcha got? You got nothing to lose here... but you'd gain a lot of knowledge and learn some new skills and work habits that you can and will apply elsewhere as you age... If its beyond repair so what! If its repairable cheap then you are a courageous winner! Your only other option at this point is to turn your back on it, throw your wallet at it, and hope you get lucky with a used motor. Lets go boys... :-)
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post #9 of 84 (permalink) Old 01-07-2018, 01:03 PM
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Well outlaws where can he send this engine and tranny for a full rebuild?
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post #10 of 84 (permalink) Old 01-07-2018, 01:08 PM
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Quote:
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Well outlaws where can he send this engine and tranny for a full rebuild?
Goober! :-)


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